{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["concept or principle", "material", "biomedical", "process characterization", "machine or equipment", "engineering feature"], "input": "This sealed chamber may be at an elevated temperature but still considerably below the melting point of the metal ."}
{"concept or principle": [], "material": ["be", "metal"], "biomedical": [], "process characterization": [], "machine or equipment": [], "engineering feature": []}